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Re: [Shop-talk] Basic MIG Welding questions

To:,, Jim Stone <>
Subject: Re: [Shop-talk] Basic MIG Welding questions
From: Charlie Schlismann <>
Date: Tue, 3 Feb 2009 20:40:55 -0800 (PST)
--- On Mon, 2/2/09, Jim Stone <> wrote:

> Not as far as I can tell.  The owner's manual
> doesn't indicate anything about
> purging per se, but here's how it describes setting the
> gas flow rate:
> Flow Adjust
> Flow rate should be set when gas is
> flowing through welding power
> source and welding gun. Open
> feedhead pressure assembly so
> that wire will not feed. Press gun
> trigger to start gas flow.
> I could be wrong, but I assume that a purge valve could be
> used here, if the
> 140 had one.

I teach my welderettes (I've found women to be superior welders, once trained) 
to keep the feed roll pressure to a minimum.  Rollers slip when the wire hits a 
surface not connected to the work cable and gas purges the cablehose.  And 
absolutely no birdnesting of the wire.  As always, YMMV.


#71 MiDiv F500
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